I apologize for my ignorance, I've been struggling with this one for a
couple hours and can't figure it out. Why does apply not work with
constructors, special forms, etc.? Is there some other standard way to
unpack a list? My question is outlined below, I have a variable length list
of parameters that I want to send to the matching constructor:
;; parameter list, can also be of length 3 or 4
user=> (def params '("example.com" 5222))
(def params '("example.com" 5222))
#'user/params
;; thought this would work
user=> (apply ConnectionConfiguration. params)
(apply ConnectionConfiguration. params)
java.lang.ClassNotFoundException: ConnectionConfiguration.
(NO_SOURCE_FILE:66)
;; thought this would work also
user=> (apply new ConnectionConfiguration params)
(apply new ConnectionConfiguration params)
java.lang.Exception: Unable to resolve symbol: new in this context
(NO_SOURCE_FILE:68)
;; can do it with eval, but what is the correct way?
user=> (eval `(ConnectionConfiguration. ~...@params))
(eval `(ConnectionConfiguration. ~...@params))
#<ConnectionConfiguration
org.jivesoftware.smack.connectionconfigurat...@a0430b6>
Any input is appreciated.
Thanks.
- Mark
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